to break, or cause something to break, into small pieces

She nervously crumbled the bread between her fingers. 她紧张地在指间捻着面包。

The cliffs on which the houses are built are starting to crumble. 上面建有房屋的悬崖开始倾颓瓦解。

to become weaker in strength or influence

Support for the government is crumbling. 对政府的支持日渐减少。

a sweet dish made from fruit covered in a mixture of flour, butter, and sugar rubbed together into small pieces, baked, and eaten hot

apple crumble 酥皮苹果甜点